Tite-Fit™ round-wound nickel-plated electric guitar strings are designed to be a great all-around string. They are available in a wide range ot gauges. Based upon a round core, the construction techniques for the Tite-Fit™ electrics are very old. However, the core wire and wrap wire in DR's are the latest, most advanced and expensive metals available. For flexibility, tone, and long string life whether you play rock, blues, heavy metal, or jazz, Tite-Fits™ are an incredible all around string.